瑜伽論記 20.471

20.471

又解：舊人依中邊論云：七種真如皆是真如，而言苦諦真如，苦諦者從能詮得名。言心所執受、領納、了別、染淨相者，即四念住也。苦有變異、無變異相者，苦苦壞苦名領有變異，行苦名無變異。

Another explanation: older commentators, relying on the Madhyāntavibhāga, state that the seven kinds of tathatā are all tathatā, and when it speaks of the 'tathatā of the truth of suffering', 'the truth of suffering' gets its name from that which expresses it. When it speaks of 'the marks of that which is appropriated, felt, cognized, and afflicted or purified by the mind', this refers to the four applications of mindfulness. As for 'suffering having changing marks and unchanging marks', the suffering of suffering and the suffering of change are called having changing experience, while the suffering of conditioning is called unchanging.